+1 :+1:
I can even see 730nm (which is called ‘Far red’), but my eye sensitivity is noticeably worse there (but I can still pick up that distinct deep red color very easily - and it is still much-much better than looking into 780nm near-IR LEDs). But, when I compare it to an ordinary 625nm red, the latter just looks like a very deep orange (or ‘light red’).
660nm could be a sweet spot, as the human eye still has fairly good sensitivity to that - despite it is a ‘redder’ red.
Speaking about special light sources, there are even less ‘lava’ or ‘ultra warm white’ flashlights around.
But there could be a potential, I mean, the BLF community already accessed and tested a few very good emitters:
Luminus Xnova Cube (1800K, 90CRI)
Nichia E21A (which has 2000K CCT variant with CRI 95 and R9 above 90)
For some applications, I could even imagine using a 1300K to 1600K CCT emitter, but unfortunately I haven’t see a good one yet. The trick in having a non-monochrome (but still very ‘dark adapted eye friendly’) light source, that one still can perceive colors (just blue light is making up a very tiny part of the emitted spectrum, and cyan/green light is still rather slim), and it covers most of the situations, where previously 625nm red lights were used, but it is easier to see with.
So, if I think about alternative C01 versions (just hypothetically, based on my needs/preferences/wishes), I would be in for C01L (‘Lava’), and C01DR (‘Deep red’).
By the way, I do know, that doing negotiations with flashlight manufacturers is a meticulous task, so I thank you for your efforts.